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  • Title: Evaluation of the efficacy and safety of oral tiludronate in Paget's disease of bone. A double-blind, multiple-dosage, placebo-controlled study.
    Author: Reginster JY, Colson F, Morlock G, Combe B, Ethgen D, Geusens P.
    Journal: Arthritis Rheum; 1992 Aug; 35(8):967-74. PubMed ID: 1642662.
    Abstract:
    OBJECTIVE: To assess the optimal dosage of oral tiludronate in Paget's disease of bone. METHODS: We studied 149 patients with Paget's disease, in a double-blind, randomized, placebo-controlled trial. Patients were randomly assigned to 1 of 5 therapeutic groups: a daily dose of 100 mg, 200 mg, 400 mg, or 800 mg of oral tiludronate, or a placebo. Treatment was for 3 months, followed by 3 months of placebo-controlled followup. Serum alkaline phosphatase activity (SAP) and fasting urinary excretion of hydroxyproline/creatinine (OH/Cr) were measured monthly, as were biochemical parameters reflecting renal, hepatic, and hematologic functions. Analgesic efficacy was self-evaluated from a visual analog scale and a global pain index. RESULTS: Statistical analysis revealed that beginning at a dosage of 200 mg/day, there was a direct dose-dependent effect on the reduction of SAP and OH/Cr levels. Reduction of SAP levels was clinically significant at a dosage of 400 mg (44.9 +/- 4.2% reduction at 90 days and 49.2 +/- 4.5% at 180 days, mean +/- SEM) and at 800 mg (53.4 +/- 5% at 90 days and 59.3 +/- 4.6% at 180 days). There was a significant reduction in pain in all groups, including the group taking placebo. In only those taking 800 mg/day of tiludronate was there a significant frequency of complete resolution of pain (versus placebo). Aside from mild gastrointestinal disturbances, as experienced with other oral bisphosphonates, clinical tolerance of all 5 regimens was good. Exhaustive biochemical investigations failed to reveal significant toxicity of tiludronate up to the 800-mg daily dose investigated. CONCLUSION: Because of its significantly better antiresorptive effects and greater analgesic properties (compared with lower dosages), combined with the excellent clinical and biochemical tolerance, the 800-mg daily dose of tiludronate appears to be optimal for the treatment of Paget's disease of bone.
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